/* Sankey Open Studio — open source, MIT licensed
   Theme: "Shoreline" — warm sand, ocean teal, soft rounded forms. */

:root {
  --page: #ede5d3;
  --page-deep: #e4d9c1;
  --surface: #fbf7ec;
  --card: #faf6ea;
  --paper: #fcfcfb;              /* diagram canvas, matches exports */
  --hairline: #ddd1b8;
  --border: rgba(61, 44, 30, 0.22);
  --ink: #33281a;
  --ink-2: #635640;
  --muted: #9a8c70;
  --accent: #0e7490;
  --accent-deep: #0a5a70;
  --accent-wash: #e2eff2;
  --grad: linear-gradient(135deg, #0e8aa5, #0a5a70);
  --danger: #c0442c;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 14px 36px rgba(61, 44, 30, 0.18);
  --shadow-soft: 0 2px 10px rgba(61, 44, 30, 0.08);
  --font: system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1000px 420px at 90% -8%, rgba(14, 116, 144, 0.09), transparent 60%),
    linear-gradient(180deg, #f2ecdd, var(--page-deep));
  background-attachment: fixed;
}

body { display: flex; flex-direction: column; }

::selection { background: rgba(14, 116, 144, 0.25); }

/* ---------- Top bar ---------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 11px 20px;
  background: rgba(251, 247, 236, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 30;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.brand svg { border-radius: 7px; box-shadow: 0 3px 10px rgba(14, 116, 144, 0.3); }

.name-input {
  flex: 1;
  min-width: 160px;
  max-width: 440px;
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
}
.name-input::placeholder { color: var(--muted); }
.name-input:hover { border-color: var(--hairline); background: var(--surface); }
.name-input:focus { outline: none; border-color: var(--accent); background: #fff; }

.topbar-actions { display: flex; align-items: center; gap: 9px; margin-left: auto; flex-wrap: wrap; }

/* ---------- Buttons ---------- */

.btn {
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 15px;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, transform 0.05s;
  text-decoration: none;
  display: inline-block;
}
.btn:hover { background: #f0e8d5; border-color: rgba(61, 44, 30, 0.35); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.btn-primary {
  background: var(--grad);
  border: none;
  color: #fff;
  box-shadow: 0 4px 14px rgba(14, 116, 144, 0.35);
}
.btn-primary:hover { filter: brightness(1.1); background: var(--grad); }

.btn-danger-ghost { color: var(--danger); }
.btn-danger-ghost:hover { background: #f7e5df; border-color: rgba(192, 68, 44, 0.4); }

.btn-wide { width: 100%; }

.icon-btn {
  padding: 2px 10px;
  font-size: 18px;
  line-height: 1.2;
  border: none;
  background: transparent;
  border-radius: 999px;
  color: inherit;
  cursor: pointer;
}
.icon-btn:hover { background: #efe7d4; }

.file-btn { position: relative; overflow: hidden; }
.file-btn input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }

/* ---------- Menus ---------- */

.menu-wrap { position: relative; }
.menu {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  box-shadow: var(--shadow);
  min-width: 160px;
  z-index: 40;
  padding: 5px;
}
.menu button {
  display: block;
  width: 100%;
  text-align: left;
  font: inherit;
  font-size: 13px;
  color: var(--ink);
  background: none;
  border: none;
  padding: 9px 12px;
  border-radius: 9px;
  cursor: pointer;
}
.menu button:hover { background: var(--accent-wash); }

/* ---------- Workspace ---------- */

.workspace {
  flex: 1;
  display: flex;
  min-height: 0;
}

.canvas-wrap {
  flex: 1;
  min-width: 0;
  overflow: auto;
  padding: 26px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#chart {
  background: var(--paper);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  max-width: 100%;
  height: auto;
  display: block;
}

.credit {
  font-size: 12px;
  color: var(--muted);
  margin: 14px 0 0;
  letter-spacing: 0.01em;
}
.credit a { color: var(--accent); text-decoration: none; font-weight: 700; }
.credit a:hover { text-decoration: underline; }

.empty-hint {
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--ink-2);
  font-size: 14px;
  pointer-events: none;
}

/* ---------- Sidebar ---------- */

.sidebar {
  width: 330px;
  flex-shrink: 0;
  overflow-y: auto;
  padding: 20px 16px 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel {
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: 16px;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  flex-shrink: 0; /* never compress panels; let the sidebar scroll instead */
}
.panel summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: #7c5b33;
  padding: 13px 15px;
  list-style: none;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 9px;
}
.panel summary::-webkit-details-marker { display: none; }
.panel summary::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--grad);
  transition: border-radius 0.18s, transform 0.18s;
  flex-shrink: 0;
}
.panel[open] summary::before { border-radius: 2px; transform: rotate(45deg); }
.panel summary:hover { color: var(--ink); }
.panel-body { padding: 2px 15px 16px; display: flex; flex-direction: column; gap: 11px; }

.field { display: flex; flex-direction: column; gap: 5px; font-size: 12px; font-weight: 600; color: var(--ink-2); }
.field input[type="text"], .field select {
  font: inherit;
  font-size: 13px;
  font-weight: 400;
  color: var(--ink);
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  width: 100%;
  min-width: 0;
}
.field input[type="text"]:focus, .field select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.field input[type="range"] { width: 100%; accent-color: var(--accent); }
.field input[type="color"] {
  width: 46px;
  height: 32px;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
}
.field.checkbox { flex-direction: row; align-items: center; gap: 8px; font-weight: 400; font-size: 13px; color: var(--ink); }
.field.checkbox input { accent-color: var(--accent); }
.field-pair { display: flex; gap: 8px; }
.field-pair .field { flex: 1; min-width: 0; }

.palette-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 7px;
  margin-top: 4px;
}
.preset {
  display: flex;
  height: 24px;
  border-radius: 7px;
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer;
  padding: 0;
  background: none;
  transition: transform 0.1s, box-shadow 0.1s;
}
.preset span { flex: 1; }
.preset:hover { transform: scale(1.07); box-shadow: 0 2px 8px rgba(61, 44, 30, 0.25); }
.preset:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.val { color: var(--muted); font-weight: 400; }

.hint { font-size: 12px; color: var(--muted); margin: 0; line-height: 1.5; }
.hint a { color: var(--accent); font-weight: 600; }

.row-actions { display: flex; gap: 8px; }
.row-actions .btn { flex: 1; }

/* ---------- Data table ---------- */

.table-scroll {
  max-height: 320px;
  overflow-y: auto;
  border: 1px solid var(--hairline);
  border-radius: 12px;
  background: #fff;
}

.data-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.data-table th {
  text-align: left;
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding: 7px 8px;
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  background: var(--surface);
  z-index: 1;
}
.data-table td { border-bottom: 1px solid #f0ead9; padding: 0; }
.data-table input {
  width: 100%;
  font: inherit;
  font-size: 12px;
  border: none;
  padding: 7px 8px;
  background: transparent;
  color: var(--ink);
}
.data-table input:focus { outline: 2px solid var(--accent); outline-offset: -2px; border-radius: 6px; }
.data-table .amount-cell { width: 70px; }
.data-table .del-cell { width: 26px; text-align: center; }
.del-row {
  border: none;
  background: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 14px;
  padding: 2px 6px;
}
.del-row:hover { color: var(--danger); }

/* ---------- Drawer ---------- */

.backdrop {
  position: fixed;
  inset: 0;
  background: rgba(51, 40, 26, 0.4);
  backdrop-filter: blur(2px);
  z-index: 50;
}

.drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 350px;
  max-width: 92vw;
  background: var(--surface);
  z-index: 60;
  box-shadow: var(--shadow);
  border-right: 1px solid var(--hairline);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.drawer-head { display: flex; align-items: center; justify-content: space-between; }
.drawer-head h2 { margin: 0; font-size: 16px; }
.drawer-hint { flex-shrink: 0; }

.diagram-list { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; }
.diagram-list li {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 10px;
  border-radius: 14px;
  border: 1px solid transparent;
}
.diagram-list li:hover { background: #f2ecdc; }
.diagram-list li.current { border-color: var(--accent); background: var(--accent-wash); }
.diagram-list .d-name { flex: 1; min-width: 0; cursor: pointer; }
.diagram-list .d-name strong { display: block; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.diagram-list .d-name small { color: var(--muted); font-size: 11px; }
.diagram-list .btn { padding: 5px 12px; font-size: 12px; }

/* ---------- Modal ---------- */

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 560px;
  max-width: 94vw;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  z-index: 60;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.modal-head { display: flex; align-items: center; justify-content: space-between; }
.modal-head h2 { margin: 0; font-size: 16px; }
.modal textarea {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  resize: vertical;
  white-space: pre;
}
.modal textarea::placeholder { color: var(--muted); }
.modal-foot { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.modal-foot .btn-primary { margin-left: auto; }

/* ---------- Node popover ---------- */

.popover {
  position: absolute;
  width: 285px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--hairline);
  z-index: 45;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.popover-head { display: flex; align-items: center; justify-content: space-between; font-size: 14px; }

.swatches { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.swatch-row { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.hex-input {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  width: 94px;
  padding: 7px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}
.hex-input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.recent-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  margin-top: 6px;
}
.recent-row .swatches { margin-top: 0; }
.swatch {
  width: 23px;
  height: 23px;
  border-radius: 50%;
  border: 1px solid var(--border);
  cursor: pointer;
  padding: 0;
  transition: transform 0.1s;
}
.swatch:hover { transform: scale(1.12); }
.swatch.selected { outline: 2px solid var(--accent); outline-offset: 1px; }

/* ---------- SVG diagram ---------- */

#chart .node-rect { cursor: grab; }
#chart .node-rect:active { cursor: grabbing; }
#chart .link { fill: none; transition: stroke-opacity 0.1s; }
#chart text { font-family: var(--font); }

.tooltip {
  position: fixed;
  background: #2a2114;
  color: #faf6ea;
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 10px;
  pointer-events: none;
  z-index: 70;
  max-width: 280px;
  line-height: 1.4;
  box-shadow: 0 6px 20px rgba(51, 40, 26, 0.35);
}

/* ---------- Scrollbars (WebKit) ---------- */

.sidebar::-webkit-scrollbar, .table-scroll::-webkit-scrollbar, .diagram-list::-webkit-scrollbar { width: 9px; }
.sidebar::-webkit-scrollbar-thumb, .table-scroll::-webkit-scrollbar-thumb, .diagram-list::-webkit-scrollbar-thumb {
  background: rgba(61, 44, 30, 0.2);
  border-radius: 8px;
}

/* ---------- Small screens ---------- */

@media (max-width: 860px) {
  .workspace { flex-direction: column; }
  .sidebar { width: 100%; }
  .canvas-wrap { padding: 12px; }
}